Samsung Galaxy Tab 7.7
Bruce T. Johnson | Network Engineer | Partners Healthcare
617.726.9662 | Pager: 31633 | bjohns...@partners.org
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] on behalf of Anders
How about 802.11r Fast Roaming/Proactive Key Caching?
Thanks,
Bruce T. Johnson | Network Engineer | Partners Healthcare
617.726.9662 | Pager: 31633 | bjohns...@partners.org
149 13th Street, 10th Floor, Mailstop 10055B, Charlestown, Ma 02129
-Original Message-
From: Voll, Toivo
Thanks Curtis, missed the earlier amendment.
Thanks,
Bruce T. Johnson | Network Engineer | Partners Healthcare
617.726.9662 | Pager: 31633 | bjohns...@partners.org
149 13th Street, 10th Floor, Mailstop 10055B, Charlestown, Ma 02129
-Original Message-
From: Curtis K. Larsen
Hi David,
Please forward me a copy of your research report.
Thanks,
Bruce Johnson | Network Engineering
Partners Healthcare | 617.726.9662
bjohns...@partners.orgmailto:bjohns...@partners.org
On May 10, 2012, at 3:11 PM, David J Molta
djmo...@syr.edumailto:djmo...@syr.edu wrote:
I had some
If you have RRM enabled, you may want to check your RRM transmit power
threshold (show advanced 802.11a/b tx-power-control-thresh). Compare your
running configuration with your original configuration before the upgrade. As
mentioned, where you upgraded from can be a difference maker,
The question I have had with Ruckus is how their APs coordinate their
beamforming activities so as to not contend for the same clients. It seems
there would need to be a control plane to avoid AP contention.
How does one survey for these APs? Do you factor in the beamforming (unicast
frames,
- 54th Ave S St.
Petersburg, FL 33711
On 8/17/11 10:38 AM, Johnson, Bruce T. wrote:
The question I have had with Ruckus is how their APs coordinate their
beamforming activities so as to not contend for the same clients. It seems
there would need to be a control plane to avoid AP contention.
How
: Johnson, Bruce T. [bjohns...@partners.org]
Subject: Re: [WIRELESS-LAN] Ruckus
From what I can tell they use the MAC address as a base identifier; in a mesh
the system identifies the device and somehow decides and which AP has a better
signal/connection. Unmeshed APs simply hold on to the device
Is the AP configured with 2 transmit antennas? Try rebooting/
resetting the AP to factory default? Toggling ClientLink?
Bruce T. Johnson | Network Engineer | Partners Healthcare |
617.726.9662 bjohns...@partners.org
On Apr 13, 2010, at 11:33 AM, Mike King m...@mpking.com wrote:
Ok. I
I'd bring the 1250 to a bar fight. It's more Medieval.
Bruce T. Johnson | Partners Healthcare | Network Engineering
617.726.9662 | Pager: 31633 | bjohns...@partners.org
-Original Message-
From: Jeffrey Sessler [j...@scrippscollege.edu]
Received: 4/11/10 10:27 PM
To:
Thanks Mike and Loc,
The more TAC cases opened for this the better. It's getting the WNBUs
attention, and needs to be checked in for resolution in the next release (so
far looks like they're still trying to isolate the issue -- don't be surprised
if they ask you to actively monitor).
The bug
Mike,
Depending on your AP density and client base you might want to further restrict
your data rates. The 1140s vary their transmit power by data rate for 802.3af
compatibility and beam-forming (ClientLink). ClientLink and MRC will mitigate
these transmit power reductions for legacy clients.
Tim,
What WCS report did you run to get these up/down events?
Thanks,
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | bjohns...@partners.org
-Original Message-
From: Timothy Payne [tpay...@macalester.edu]
Received:
His Joseph,Regarding your Xirrus deployment, has that resulted in a better than 1:1 replacement ratio?Regards,Bruce T. Johnson | Network Engineer | Partners Healthcare617.726.9662 | Pager: 31633 | bjohns...@partners.org 149 13th Street, 10th Floor, Mailstop 10055B, Charlestown, Ma 02129
All,
It should be noted that since the 1140 uses standard PoE, it makes some
sacrifices in transmit power by data rate and MCS/ Beam-Forming support.
The 1250 just has the standard FCC UNII-band EIRP transmit power restrictions
(with Cisco's implicit antenna gain for external antenna
Ian,
Apart from the possible RF causes mentioned (you can try running a dot11
linktest against the root/parent mac).
1. Is the Aironet IE enabled on the SSID? What about dot11 extension aironet
on the AP interface?
2. Is the bridge setup as a mobile station (under d0/1 interface)? This is the
Hector,
Have you tried disabling/enabling or deleting/re-adding the missing WLANs? Does
a new WLAN show up in the default group?
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | bjohns...@partners.org
Thanks Hector. That's a tough one. Good luck with the TAC on getting this
resolved.
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | bjohns...@partners.org
From: The EDUCAUSE Wireless Issues
Where self-healing network is building on .
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce T
Sent: Thursday, June 11, 2009 7:05 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Is the 5508 still under the control of the same relatively non-transparent
operating system? Can we see/manipulate flash or firmware/config files, and
monitor processes? Is there any hope for this being more IOS like now that its
on next-generation hardware?
Bruce T. Johnson | Network Engineer
Thanks Philippe,
Is load-balancing the only algorithm available for this method of VLAN
assignment?
--Bruce Johnson
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Philippe Hanset
Sent:
PM, Johnson, Bruce T wrote:
Thanks Philippe,
Is load-balancing the only algorithm available for this method of VLAN
assignment?
--Bruce Johnson
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu
] On Behalf Of Johnson, Bruce T
Sent: Friday, May 15, 2009 1:25 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] WLAN Deployment-High number of users
Yes I can imagine. Thanks for the heads-up.
How hard has it been to provision via RADIUS? I am in favor
they get limited or no connectivity until Microsoft retries the dhcp
requests...
Having one or two SSIDS is king, and when it works, its magic!
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce T
Sent
Thanks Jason and Mike.
Great feedback. We have our Network Security folks administer RADIUS, so I'm
trying to gauge operational impact. How much time do you think this adds to the
workload? Are there flexible wildcard-match options?
Regards,
Bruce T. Johnson | Partners Healthcare
Network
Is that a temporary condition until DHCP completes?
Bruce T. Johnson | Network Engineer
Partners Healthcare | Network Engineering | 617.726.9662 | Pager: 31633 |
bjohns...@partners.org BLOCKED::mailto:bjohns...@partners.org
From: The EDUCAUSE Wireless
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce T
Sent: Friday, May 15, 2009 12:45 PM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] WLAN Deployment-High number of users
Is that a temporary condition until DHCP completes?
Bruce T. Johnson | Network Engineer
Ditto here too. Waiting for 6.0 MR1 with Legacy Beam Forming (OFDM clients
required).
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | bjohns...@partners.org |
149 13th Street, 10th Floor, Mailstop 10055B, Charlestown, Ma 02129
Lee,
How old are these 1130s? Some older ones have issues using all the
5GHz bands, they may have other issues.
Check the Field Notices on CCO.
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | bjohns...@partners.org
149 13th
that this sort of thing is far from being a
Cisco-only problem, though.
-Lee
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce T
Sent: Thursday, March 19, 2009 11:59 AM
I agree with you - the current state of jumping around between contexts to
configure and troubleshoot is not very good, not to mention that its still a
very MAC-layer intensive troubleshooting process. I can't even get what data
rate a client is connected without doing a remote debug, and there's
Lee and John,
What's lacking in AirWave's config capabilities? Doesn't it support all the
controller's configuration elements? Is this a matter of some here (CLI), some
there (controller GUI or NMS)?
I liked AirWave's directory-based approach. To me it allows for better
configuration
They have to be referring to real throughput (for once), and up to is an
really sneaky preface.
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | bjohns...@partners.org
From: The EDUCAUSE Wireless
Check your WLAN Session timeout - this forces a full re-auth at the specified
interval. The default for dot1x is every 30 minutes. You may want to make this
value larger. The User Idle Timeout will do the same thing, but most laptops
generate enough incidental traffic to keep the idle timer
...@bayerbbs.com
WEB http://www.bayerus.com http://www.bayerus.com/
Johnson, Bruce T bjohns...@partners.org
Sent by: The EDUCAUSE Wireless Issues Constituent Group Listserv
WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
02/19/2009 11:20 AM
Please respond to
The EDUCAUSE
, 10th Floor, Mailstop 10055B, Charlestown, Ma 02129
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce T
Sent: Tuesday, February 17, 2009 9:48 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Thanks Earl,
I guess we'll need an LWAPP to IOS downgrade tool until then (the crossover
cable net 10 TFTP static file technique)..
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | bjohns...@partners.org |
149 13th Street, 10th
Hector,
I believe this is what I have observed as well. Sometimes you have to open the
network icon in the systray to get the credential box to appear. I see this
when I log on locally as an Administrator rather than a domain user.
While we're talking about PEAP, does anyone know whether
Morrisville State College
315-684-6053
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce
T
Sent: Wednesday, January 28, 2009 11:36 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: [WIRELESS-LAN
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce
T
Sent: Thursday, January 29, 2009 10:25 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] 802.11n testplans
Thank you Matt,
I appreciate the feedback and may want to get more of your Meru
experiences
offline. A 5GHz
Now that would be interesting - different data rates and/or Radio Management
support, per controller, based on an AP Grouping mechanism. The fatter these
controllers get the more it has to be the procrustean bed for all sorts of
wireless devices. Does any Thin AP vendor support this?
Bruce T.
of North Carolina Pembroke-
Division of Information Technology
Network Security Specialist
910-521-6260
chris.des...@uncp.edu
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:wireless-...@listserv.educause.edu] On Behalf Of Johnson, Bruce T
Sent
Chris,
You have some good points here. You are incorrect on the power setting per
controller comment. Cisco's Radio Resource Management (RRM or Auto-RF) can
change the power differentially across APs, and APs can be selectively removed
from global RRM control for power and channel changes, and
Toivo et al,
Great comments. Does anyone have any 802.11n testplans they are willing to
share?
802.11n Survey experiences? Has it turned the traditional survey methodology on
its head, or do we still have to consider legacy and so the n simply stands
for Nice (if you have it).
Anyone with
Brady,
I'm curious - does enabling a-mpdu support disable a-msdu support? Given that
a-msdu aggregation does not supply a header and checksum for each frame might
explain the performance problems.
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 |
Sounds like TKIP countermeasures kicking in. A man-in-the-middle attack was
detected.
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | [EMAIL PROTECTED]
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent
Has anyone seen or know of how this client-based TKIP notification manifests on
Cisco controllers?
Bruce T. Johnson | Network Engineer | Partners Healthcare
Network Engineering | 617.726.9662 | Pager: 31633 | [EMAIL PROTECTED]
-Original Message-
From: The EDUCAUSE Wireless Issues
Do people deploying the 1252s find that 802.11a and 802.11g clients are getting
better range and/or throughput?
I understand that MIMO and MRC will improve the AP's receive sensitivity, making
clients more visible, but I was curious whether this would apply to the
downstream as well as the
What transmit power are people being using on the 1252 2.4 and 5GHz .11n radios?
Are you stepping down the power to reduce the increased range effect?
I agree small cells with greater throughput are better, but more robust coverage
is also an important consideration, depending on location
CSCsr40109 Bug Details
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBu
gDetailsbugId=CSCsl51486from=summary
Mobility announcements not sent after an upgrade when wrong version
Symptom:
When a mobile station roams from an AP joined to one controller, to an AP
this issues was not mobile at all, so it made
sense to change the roaming settings to a lower value.
Hector
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
Sent: Sunday, October 19, 2008 12:20 PM
To: WIRELESS-LAN
Issues Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
Sent: Thursday, October 09, 2008 10:40 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Cisco Wireless Controller
That's a good point Jeff,
I understood RLDP causes APs to become active
Information Technology and Services
Syracuse University
315 443-3003
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
Sent: Thursday, October 09, 2008 10:40 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
I have seen the radios reset. You can configure the controller to have APs to
individually syslog to a desktop syslog tool like the Kiwi Syslog Daemon to
verify this. Its a good way to see if anything odd is happening.
We run 4.2.112. We also disabled Traffic Stream Metrics where we have a
Bear in mind the controllers are designed to remove associations (and save
resources) if there hasn't been any traffic seen from the clients. The User
Idle Timeout is responsible for this behavior.
You can increase this value from its default of 300s to a higher value. This
will keep the
-6053
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Johnson, Bruce
T
Sent: Friday, July 25, 2008 11:45 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] iPhone 2.0 news
Hey iPod Touch users out
Kevin,
Were you able to deploy Listening Only Monitor Mode APs? If you had a standard
data deployment of APs, how many more APs did you have to add as a percentage?
Thanks Kevin,
Bruce Johnson
Network Engineer
Partners Healthcare
617-726-9662
mailto:
Hey Stan,
What's been your experience with the PolyComm phones? Are you using the 8000
Series 802.11a phones? Their minimum RSSI spec (-60) seems to be considerably
lower than the Cisco 7921G.
I'm assuming you are using a Cisco infrastructure (apologies if not). Do these
phones truly
[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
[EMAIL PROTECTED]
Sent: Monday, June 02, 2008 11:37 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: Re: [WIRELESS-LAN] Disabling 1, 2 Mbps- revisit
Hey Stan,
What's been your experience with the PolyComm phones? Are you using the 8000
Series
[EMAIL PROTECTED]
AIM: WLANstan Yahoo!: WLANstan MSN: [EMAIL PROTECTED]
From: The EDUCAUSE Wireless Issues Constituent Group Listserv
[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
[EMAIL PROTECTED]
Sent: Monday, June 02, 2008 12:12 PM
To: WIRELESS-LAN
Brian,
We're gone from using Wireless Valley to AirMagnet Survey. The former I would
consider best of breed (allows assignment of attenuation values to CAD drawing
layers) but its a bit unwieldy (and expensive) as far as an active survey tool.
AirMagnet and Ekahau offer more reasonably
I hear you -- but I really appreciate hearing everyone gripe (and it is an
issues forum after all).
So how do we go about getting Cisco to hear all this good stuff?
Cisco are you listening?
--Bruce Johnson
-Original Message-
From: The EDUCAUSE Wireless Issues Constituent Group
Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
Sent: Friday, May 09, 2008 11:32 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: RE: [WIRELESS-LAN] Site survey requirements for wireless VOIP
I hear you -- but I really appreciate hearing everyone gripe
Wireless Issues Constituent Group Listserv
[mailto:[EMAIL PROTECTED] On Behalf Of Johnson, Bruce T
Sent: Friday, May 09, 2008 11:32 AM
To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU
Subject: RE: [WIRELESS-LAN] Site survey requirements for wireless VOIP
I hear you -- but I really appreciate hearing
;-)
Philippe
--
Philippe Hanset
University of Tennessee, Knoxville
Office of Information Technology
Network Services
108 James D Hoskins Library
1400 Cumberland Ave
Knoxville, TN 37996
Tel: 1-865-9746555
--
On Fri, 9 May 2008, Johnson, Bruce T
Thanks Daniel,
All Meru says is put your faith in Air Traffic Control without offering any
explanation how it how it addresses (coordinates) the MAC and PHY challenges
pointed out in the Aruba article.
The spirit of 802.11 is not the necessarily the content of the protocol, but
the fact
Yet another architecture (sectorized multi-AP array). This is comparing apples
and oranges (except we don't know the variety of traditional apple Tolly is
comparing Xirrus to in the study).
I think the problem is all these vendors live in Silicon Valley flatland and
don't consider the effect of
Brian,
I'm curious about your Meru experiences. Aruba recently released a white paper
on the downsides of a single-channel architecture. Its a pretty cogent
argument, and I haven't seen any response yet from Meru.
You can take a look at it here:
-LAN] Open Wireless in Higher Ed
It¹s interesting, but it¹s all theory. I don¹t see any data in this paper.
--
Daniel Eklund
Director, Network Engineering
Wayne State University
Detroit, MI 48201
Phone: 313-577-5558
Fax: 313-577-5577
From: Johnson, Bruce T [EMAIL PROTECTED]
Reply
Hey Steve,
Curious as to those high load hangs. We're running 4.2.99 on several WiSM-based
controllers. What's the symptom? Do you have to reboot the controllers?
Thanks,
*
Bruce T. Johnson
Network Engineer
Partners Healthcare
617-726-9662
with cisco.
What are you experiencing ?
Steve
Johnson, Bruce T wrote:
Hey Steve,
Curious as to those high load hangs. We're running 4.2.99 on several WiSM-based
controllers. What's the symptom? Do you have to reboot the controllers?
Thanks,
*
Bruce
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